Going through the settings, I noticed I can’t set items to be free, despite that some haven’t gotten sales after many months. Envato likely doesn’t want to further devalue the stock industry by flooding its market with a bunch of free items, so what if instead each author had a limited number of free items at a time, like 5 and those could be featured somewhere such as in a profile or specific category? Or otherwise, if the discount could be below $1 for some items, I did notice the discount feature said something like that the item needs to have been on display for at least 30 days.
Envato have several rules around promotions and bonuses or free items https://help.author.envato.com/hc/en-us/articles/360000470886-Item-Promotion-Guidelines
The need for this is to keep things balanced and fair regardless of size, portfolio, resource etc